Mesa (master): tgsi: update tgsi.rst for TXQ

[Dave Airlie]

Module: Mesa
Branch: master
Commit: 6fb12bf031fdceadebc8a3d7b7756bc822fbf6e4
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=6fb12bf031fdceadebc8a3d7b7756bc822fbf6e4

Author: Dave Airlie <airlied at redhat.com>
Date:   Thu Aug 25 13:03:19 2011 +0100

tgsi: update tgsi.rst for TXQ

add some info on the TXQ opcode.

Signed-off-by: Dave Airlie <airlied at redhat.com>

---

 src/gallium/docs/source/tgsi.rst |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst
index 4debcc6..039cb1c 100644
--- a/src/gallium/docs/source/tgsi.rst
+++ b/src/gallium/docs/source/tgsi.rst
@@ -1031,9 +1031,21 @@ XXX so let's discuss it, yeah?
   TBD
 
 
-.. opcode:: TXQ - Texture Size Query
+.. opcode:: TXQ - Texture Size Query (as per NV_gpu_program4)
+                  retrieve the dimensions of the texture
+                  depending on the target. For 1D (width), 2D/RECT/CUBE
+		  (width, height), 3D (width, height, depth),
+		  1D array (width, layers), 2D array (width, height, layers)
 
-  TBD
+.. math::
+
+  lod = src0
+
+  dst.x = texture_width(unit, lod)
+
+  dst.y = texture_height(unit, lod)
+
+  dst.z = texture_depth(unit, lod)
 
 
 .. opcode:: CONT - Continue